From mboxrd@z Thu Jan 1 00:00:00 1970 From: mailinglist-linux-scsi@adazims.com Subject: I2C/SGPIO on Marvell 88SE6440 (mvsas) Date: Thu, 06 Mar 2014 17:01:15 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.adazims.com ([185.35.78.64]:37528 "EHLO mail.adazims.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752023AbaCFQK6 (ORCPT ); Thu, 6 Mar 2014 11:10:58 -0500 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Dear All, I have one Adaptec 1405 card with a Marvell 88SE6440 chip (mvsas). The card has one SFF-8087 connector with integrated I2C/SGPIO. On the other side my cable is SFF-8484 and connected to one simple 4x SAS/SATA backplane without RAID logic (sas/sata lines are directly routed to HDDs). The problem with the backplane is that it controls SATA's pin 15 and the hard drives do not spin-up unless instructed to. This operation is handled by a PCA9556 chip located directly on the backplane. My question is, how can I talk to this PCA9556 chip using mvsas driver? Or alternatively, where to get info, what needs to be written for "mvsas" to get this working? Sincerely, Dennis